This abundance of gold and the all-engrossing pursuit of it have already caused in California an unprecedented rise in the price of all the necessaries of life.

That we may the more speedily and fully avail ourselves of the undeveloped wealth of these mines, it is deemed of vast importance that a branch of the Mint of the United States be authorized to be established at your present session in California. Among other signal advantages which would result from such an establishment would be that of raising the gold to its par value in that territory. A branch mint of the United States at the great commercial depot on the west coast would convert into our own coin not only the gold derived from our own rich mines, but also the bullion and specie which our commerce may bring from the whole west coast of Central and South America. The west coast of America and the adjacent interior embrace the richest and best mines of Mexico, New Granada, Central America, Chili, and Peru. The bullion and specie drawn from these countries, and especially from those of western Mexico and Peru, to an amount in value of many millions of dollars, are now annually diverted and carried by the ships of Great Britain to her own ports, to be recoined or used to sustain her national bank, and thus contribute to increase her ability to command so much of the commerce of the world. If a branch mint be established at the great commercial point upon that coast, a vast amount of bullion and specie would flow thither to be recoined, and pass thence to New Orleans, New York, and other Atlantic cities. The amount of our constitutional currency at home would be greatly increased, while its circulation abroad would be promoted. It is well known to our merchants trading to China and the west coast of America that great inconvenience and loss are experienced from the fact that our coins are not current at their par value in those countries.

The powers of Europe, far removed from the west coast of America by the Atlantic Ocean, which intervenes, and by a tedious and dangerous navigation around the southern cape of the continent of America, can never successfully compete with the United States in the rich and extensive commerce which is opened to us at so much less cost by the acquisition of California.

The vast importance and commercial advantages of California have heretofore remained undeveloped by the Government of the country of which it constituted a part. Now that this fine province is a part of our country, all the States of the Union, some more immediately and directly than others, are deeply interested in the speedy development of its wealth and resources. No section of our country is more interested or will be more benefited than the commercial, navigating, and manufacturing interests of the Eastern States. Our planting and farming interests in every part of the Union will be greatly benefited by it. As our commerce and navigation are enlarged and extended, our exports of agricultural products and of manufactures will be increased, and in the new markets thus opened they can not fail to command remunerating and profitable prices.

The acquisition of California and New Mexico, the settlement of the Oregon boundary, and the annexation of Texas, extending to the Rio Grande, are results which, combined, are of greater consequence and will add more to the strength and wealth of the nation than any which have preceded them since the adoption of the Constitution.

But to effect these great results not only California, but New Mexico, must be brought under the control of regularly organized governments. The existing condition of California and of that part of New Mexico lying west of the Rio Grande and without the limits of Texas imperiously demands that Congress should at its present session organize Territorial governments over them.

Upon the exchange of ratifications of the treaty of peace with Mexico, on the 30th of May last, the temporary governments which had been established over New Mexico and California by our military and naval commanders by virtue of the rights of war ceased to derive any obligatory force from that source of authority, and having been ceded to the United States, all government and control over them under the authority of Mexico had ceased to exist. Impressed with the necessity of establishing Territorial governments over them, I recommended the subject to the favorable consideration of Congress in my message communicating the ratified treaty of peace, on the 6th of July last, and invoked their action at that session. Congress adjourned without making any provision for their government. The inhabitants by the transfer of their country had become entitled to the benefit of our laws and Constitution, and yet were left without any regularly organized government. Since that time the very limited power possessed by the Executive has been exercised to preserve and protect them from the inevitable consequences of a state of anarchy. The only government which remained was that established by the military authority during the war. Regarding this to be a de facto government, and that by the presumed consent of the inhabitants it might be continued temporarily, they were advised to conform and submit to it for the short intervening period before Congress would again assemble and could legislate on the subject. The views entertained by the Executive on this point are contained in a communication of the Secretary of State dated the 7th of October last, which was forwarded for publication to California and New Mexico, a copy of which is herewith transmitted. The small military force of the Regular Army which was serving within the limits of the acquired territories at the close of the war was retained in them, and additional forces have been ordered there for the protection of the inhabitants and to preserve and secure the rights and interests of the United States.

No revenue has been or could be collected at the ports in California, because Congress failed to authorize the establishment of custom-houses or the appointment of officers for that purpose.

The Secretary of the Treasury, by a circular letter addressed to collectors of the customs on the 7th day of October last, a copy of which is herewith transmitted, exercised all the power with which he was invested by law.

In pursuance of the act of the 14th of August last, extending the benefit of our post-office laws to the people of California, the Postmaster-General has appointed two agents, who have proceeded, the one to California and the other to Oregon, with authority to make the necessary arrangements for carrying its provisions into effect.